Improved packing for piston and valve rods



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N. PETERS. PHOTO-LWHOGRAPHER, WASHINGTON, D c.

UNITED STATES PATENT OEEICE.

RICHARD MARTIN, OF BROOKLYN, NEN/V YORK.

Specification forming par-t of Letters Patent No. 35,698, dated June 24,1862.

' following to be a full, clear, and exact description of the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon.

My invention consists of a packing-ring g composed of a folded strip ofwovem hemp with a lining of wire-gauze on the inside, the whole beingconstructed substantially as described hereinafter.

The object of my improved packing is to diminish the friction producedby ordinary packing, to present a metallic and constantlylubricatedsurface for the piston or other rod to bear against, and to afford adurable and efficient packing for the stuffing-boxes of piston, pump,and other rods.

In order to enable others to make and use my invention, I will nowproceed to describe its construction and operation.

On reference to the accompanying drawings, which form a part of thisspecification, Figure l is a plan View of my improved packing forpistonrods, &c.; Fig. 2, a vertical section, and Fig. 3 a sectionalView, of an ordinary stuifiug-box containing my improved packing.

The main'body of each piece of packing is composed of a strip, A, ofcoarsely-wovenV hemp, the strip being coiled round and round, so as toform the annular mass of folds represented in Fig. 1, and within thehempen folds is contained a strip, B, of gum-elastic, the

whole being secured together and maintained in its proper annular formby stitching one fold to the adjacent fold and by driving any suitablenumber of wooden pegs, a, transversely through or nearly through thering.

To the inside of the ring is secured a cylindrieal lining, D, of gauzemade-of fine brass wire, the upper end of the gauzehaving a series offlanges, e, which lap over the top of the ring and are turned downwardand inserted between the folds, so that the wooden pegs c may passthrough the turned-down ends. The gauze, cylinder, and hempen ring maybe further secured to each other by stitching them together with brasswire. One, two, or more of these packing rings are placed round thepiston-rod G, Fig. 3,-and are tightly compressed into the stuffing-boxby the usual follower, H. The hempen ring soon becomes thoroughlyimpregnated with the oil or tallow used to lubricate the piston-rod, andowing to the pressure being exerted on the edges of the folded strip ofhemp the ring is capable of being readily expanded laterally by a veryslight pressure of the follower, the packing being consequentlymaintained perfectly tight.

The interstices of the wire-gauze lining afford such a certain lodgmentfor the oil or tallow that as the piston-rod passes through thestuffing-box it" is always in contact with the surface of thelubricating material, which is so evenly dispersed over the surface ofthe gauze that the latter, although composed of very tine wire, is freedfrom abrasion, and consequently affords a most durable lining, which,presenting a metallic surface for the piston to bear against, is themeans of preventing that excessive friction produced by ordinary packingof fibrous material.

The strip B of gum-elastic has a tendency to maintain the packing in itsannular form and imparts to the ring a desirable elasticity.

I claim as Inyinvention, and desire to secure by Letters Patent- Thepacking-ring composed of a folded strip of woven hemp with a lining ofwire gauze, the whole being constructed substantially as and for thepurpose herein set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

R. MARTIN.

YVi tnesses: Y

HENRY HoWsoN, JOHN XVHITE.

